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CVE-2021-20038: SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability
SonicWall SMA 100 Appliances · in CISA KEV since 2022-01-28
2022-01-28added to KEV
2022-02-11federal remediation due date
99.91%EPSS exploit probability (30 days) 100.0th percentile
9.8 CRITICALCVSS 3.1
Knownknown ransomware use
51days from NVD publication to KEV
What it is
SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-121 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-12-08 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-20038.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.